Rubbing block



May 15, 1923. f 1,455,559

` n A. F. WRIGHT ET AL RUBBI NG BLOCK Filed oct, 51, 1921 Snow l Patented May 15, 1923.

UNITED- sT-Afr as; 'PATENriofgF ARCHIBALD/F.: WRIGHT AND WALTER A. s'roNn-orscreams,armamenti.'ff.'11`

RUBBINGT BLOCK.

.applicanonl inea october s1, 1921.'y lseria'i No .`5ii,s71. i

'Be it "known that we, ARCHIBALDl F., VRIGHT and WALTER A. STONE, both citizensl of the United States of America, residing at StjClair, inlthe county of St. Clair and State of Michigam have invented certain new and useful Improvements in Bubbing Blocks, of which the following is a specification, reference being had therein to the accompanying drawings. 1

The invention relates to rubbing blocks particularly designed for use in the finishing or smoothing of wood-work by sand paper or other abrasive material. It is the object of the invention to obtain a. construction which may be used with various structures and which is provided with means for finishing of angles, grooves and other surfaces which are not in a single plane. It is a further vobject to provide a convenient means for clamping to the block the sand paper or other abrasive material, and with these objects in view the invention consists in the construction as hereinafter set forth.

In the drawings:

Figure l' is a perspective view of the block;

Figure 2 is a cross-section thereof;

Figure 3 is alongitudinal section.

Figure 4.- is a perspective view showing a modified construction of clamping plate.

A is the block, preferably of rectangular form, and having its lower face B in a plane. One of the edges of this block has the convex rounded surface C, while the opposite edge is formed with a concave rounded surface D. The narrow edge portion E between this concave surface and the plane B projects outward beyond the edge F at the top of' the block, as indicated in Figure 2. A third edge of the block is formed with the angle section Gr, while the opposite edge is formed with the angle groove H. I is a clamping plate, preferably formed of pressed sheet metal, having the downturned marginal flanges J. This plate'is secured by a screw or other fastening K, which projects through a slot in the plate and engages a wedge L. This wedge is referably located in an inclined depression El formed lin the plate I.

With the parts formed as described, in use, a piece of sand-paper, or other sheet of abrasive material, is drawn about the bottom of the block and over the edges thereof so as to extend obliquely inward at the top.

pendicular The plate I isthen overfthelfedgie l tions ofthe sheet and the wedge L,'islinaoved`- to effect theclamping of this plate upon the., block. VWhen the abrasive material isjthus secured, the block may 'be,used'feither'for rubbing a plane surface'orfor finishing any moldings and other angling and curved surfaces. 'Ihe projection of the edge portion E beyond the edge portion F permits of `using the blockv immediately adjacent a per-y surface without .interference withV or mar-ringy of the latter. The out; wardly projecting angling portion G is useful in finishing angle grooves, while the angle groove H is useful for finishing corners. These portions are preferably formed with one side of they angle ofv greater width than the other,'asv indicated at Gr and G2v of Figure v3. We have found this to be. of" convenience in obtaining easy access to certain portions of the work. i

The abrasive sheet may be adjusted or exchanged as frequently as desired by merelyl disengaging the wedge L and removing the clamp I. When not in use, the block may be conveniently hung 'upby providing an aperture N in the platevI with anarrow slot O leading from one side thereof.v The large aperture N permits insertion of the head of a nail or screw while ythe slot O= `engages the shank and prevents slipping off Thus the device is one whichfis exceedingly useful and convenient. v

While we have described my improvement as usedv for the polishing of wood, it is evident that it is equally applicable for polishing metals, rubbing varnished surface and for other uses. Also, in place of san paper or emery cloth, cotton, wool or other Afabrics may be used'upon the block and secured by the clamp.y i

Figure 4 shows a modified construction of A clamping plate where, in place of the straight wedge, we employ a circular wedge 10o.

L which is pivotally secured tothe plate I by a rivet P and which has the slot Q, for the passage of the headed screw K. There is also a `lug R projecting from the plate forv the turning of thev same. Thusthe rotation of this wedge will force the thickened portion thereof between the head of the screw and the plate, exerting a clamping pressure on the latter.

What weclaimas our invention is:

l. A rubbing block comprising a body portion having a plane rubbing surface andi .clamping plate being formed4 of' pressed sheet metal having depending lmarginal .flanges and a depressed central po1=tiona clamping Wedge for engaging said depressed lliro sad plm-iwwie@,111gieee,amavama` terial adapted" to lengage the" parallel faces central portion, and a Cooperating headed fastener secured to saidbody. 1

and `edge portions of said"b1ek"l a ol'arnping member forV engagingr said abrasivev mate,

rial, a Wedge engaging said clamping meinthereto, and means for securing said clampingmeinber to the top face of saidblook and vfor* lretaining said Wedge in adjusted position to clamp' said abrasive material upon said block,

tures'. I

ARCHIBALD WRIGHT; j izmir-TERA;STONE.v

1n ytestimonyL whereof We aiiiii our kberA for applying theI olampingppressure 

